The biggest thing probably is the progress with exception tracebacks objects in
exception handlers, which were not there before (always None). Having these
in place will make it much more compatible. Also with manually raised exceptions
and assertions, tracebacks will now be more correct to the line.

On a bad news, I discovered that the compiler module that I use to create
the AST from Python source code, is not only deprecated, but also broken. I
created the CPython bug about it,
basically it cannot distinguish some code of the form d[1,] = None from
d[1] = None. This will require a migration of the ast module, which
should not be too challenging, but will take some time.

I am aiming at it for a 0.2 release. Generating wrong code (Nuitka sees d[1] =
None in both cases) is a show blocker and needs a solution.

So, yeah. It's better, it's there, but still experimental. You will find its
latest version here. Please try it out and let me know what you think in the
comments section.